Heinrich weissi-iaar



June 9, 1931.

H. WEISSHAAR Y HEAT UTILIZER Filed Feb. 19, 1930 Patented June 9, 1931 STATES HEINRICH WEISSI-IAAR, F STUTTGART, GERMANY HEAT UTILIZER Application filed February 19, 1930, Serial No. 429,799, and in Germany February 27, 1929.

This invention relates to a heat utilizer in which the unused flue gases passing off into the chimney in known manner in furnaces and stove-heating, are utilized entirely. The heat utilizer'is inserted as a connecting piece between smoke pipes of any shape or cross-section and permits both a direct passage of the line gases (for example, when heating up) and an indirect passage in spiral by means of adjustable registers provided with marks enabling the position of the registers to be ascertained from the outside.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which:

Fig. 1 is a cross-section on line 1 1 of Fig. 2. I

Fig. 2 shows the utilizer in longitudinal section.

Fig. 3 is a detail of the utilizer.

Fig. 4: is a similar view to Fig. 2, the registers being in lowered position.

The heat utilizer consistsof an outer jacket as enclosing an inner continuous pipe 6. This jacket is conically closed at the lower end and at the upper end by a removable tubular connection h for the purpose of "cleaning. The

central pipe I; has four openings 1, 2, 3 and 4 and registers 0, (Z arranged within the range of these openings, oscillatable on an axle f and provided on their outer ends, projecting through the acket a, with pointers g serv ing as turning handles. The space between the jacket 66 and the pipe 7) is subdivided by two diametrically arranged partitions e.

In Figs. 1 and 2 the heat utilizer is in ordinary position so that, for example, when heating up or when a strong draught is required, a direct through flow of the flue gases v 4 is obtained with only a slight brushing against the outer jacket a. If it is desired, to obtain an extensive utilization of the flue gases, the registers 0, d are turned into the position shown in Fig. 4:, whereby the openings 1, 4 are closed from below and the openings 2, 3 from above, so that the flue gases must flow in the direction indicated by arrow lines and which is about three times as long as the ordinary straight path. The outer jacket is therefore strongly heated and consequently causes a more intensive heating of the room.

I claim 1. A heat utilizer for building in flues of heating furnaces, stoves and the like, comprising 1n combination an inner fiue p1pe, an 

